In September, Larson Inc. sold 40,000 units of its only product for $240,000, and incurred a total cost of $225,000, of which $25,000 was fixed costs. The flexible budget for September showed total sales of $300,000. Among variances for the period were: total variable cost flexible-budget variance, $8,000U; total flexible-budget variance, $63,000U; and, sales volume variance, in terms of contribution margin, $27,000U. The master budget operating income for September, to the nearest dollar, was: $110,000 $78,000. $108,000. $135,000. $105,000